A Water Pillar's Guide to Becoming a Police Officer

Tomioka Giyu is confused. A moment ago, Muzan was struggling under the sun right before his eyes. But before victory was within his grasp, in the blink of an eye, he found himself hundreds of years in the future. A modern city where he feels completely out of place, a fast-paced life where everyone is hurrying along, a brand-new police ID in his pocket, and undercurrents stirring through the streets and alleys... Listening to the female voice in his head announce that she is the Metropolitan Police Department System, the Water Hashira of the Demon Slayer Corps begins a new life on hell difficulty, utterly bewildered. But one day, he suddenly discovers that at the bottom of the updated mission list is a final task: wipe out the Kizuki Group. Ah, the demon slayer thinks, this is the sole reason he came to this world. To send the seaweed-haired leader of the Kizuki Group flying with the only wooden sword in the police dormitory. Ding ding ding! A quick commercial break! This is the Metropolitan Police Department System! Ordinary, unremarkable police officer, are you dissatisfied with your life? Do you want a fluffy, warm owl? Do you want a butterfly orchid blooming in the breeze? The Holy Grail can grant all your wishes! Rewrite reality and gain the power to change the past! ...Sorry, Excalibur isn't an option. Reader's Guide: 1. Here we go again: this is the Water Hashira's journey. 2. Compared to the other story, the burden of fighting will be somewhat lighter. 3. Since the Holy Grail is here, people from the Type-Moon universe may make an appearance. 4. Police officers from other anime may appear, too. 5. The blurb may change at any time before I finish the outline (serene). Theme: Beautiful things should not be let down.